نتایج جستجو برای: soil macrofauna

تعداد نتایج: 181592  

2016
Shaieste Gholami Ehsan Sayad Robin Gebbers Michael Schirrmann Monika Joschko Jens Timmer

Soil macrofauna play major roles in ecosystem functioning; however the ecological effects of macrofauna are influenced by their spatial distribution. Close relationships to soil properties are one major factor for determining spatial pattern of macrofauna. Information about macrofauna distribution pattern is scarce especially at regional scales. The limited numbers of studies available suggest ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی گرگان - دانشکده جنگلداری و مهندسی چوب و کاغذ 1391

درک الگوی توزیع مکانی ماکروفون خاک بدلیل اثرات آن روی فرآیندهای اکوسیستم بسیار مهم است. لیکن اطلاعات کمی در این خصوص وجود دارد. درمورد تنوع زیستی ارگانیسم ها وجانداران خاکزی که ازاجزای مهم وکلیدی درهرسیستم اکولوژیکی هستند و در بهبود حاصلخیزی خاک و تولیدات زمین وپایداری اکوسیستم ها(ازطریق فرآیندهای بیولوژیک)نقش عمده دارند تحقیقات کمی انجام شده است. این تحقیق جهت بررسی الگوی مکانی پارامترهای تنوع...

حسینی, سید محسن, سلمان ماهینی, عبدالرسول , صیاد, احسان , غلامی, شایسته , محمدی , جهانگرد,

The spatial distribution of soil organisms is influenced by the plant cover, thus resulting in a horizontal mosaic of areas subjected to gradients of nutrient availability and microclimatic conditions.This study was conducted to investigate the spatial variability of soil macrofauna in relation to vegetation density in the riparian forest landscape of Karkhe. The vegetation density was determin...

2011
N. Pauli E. Barrios T. Oberthür

Running title: 23 Soil macrofauna in the 'Quesungual' agroforestry system 24 25 2 Abstract 26 Smallholder agroforestry systems often incorporate features that are associated with abundant, 27 diverse soil macrofauna populations. This study sampled soil macrofauna communities across 28 four major land uses present within agricultural landscapes where the Quesungual Slash-and-29 Mulch Agroforestr...

2007
Eric BLANCHART Xavier SARDA Marcos SIQUEIRA Eric SCOPEL Christian FELLER

Soils represent a large carbon pool, approximately 1500 Gt, equivalent to almost three times the quantity stored in terrestrial biomass and twice the amount stored in the atmosphere. Any modifi cation of land-use or land management can induce variations in soil carbon stocks, even in agricultural systems that are perceived to be in a steady state. Th ese modifi cations also alter soil macrofaun...

صیاد, احسان, طالشی, حمید , عسکرپور, محمدرضا ,

Soil macrofauna biodiversity has an important role in ecosystem services. In order to find how soil macrofauna biodiversity is related to trees and shrubs in riparian forest of Maroon River in Khuzestan province, soil macrofauna were collected using hand-sorting procedure from 0-10 and 10-25 cm soil depths in 50 cm × 50 cm plots, 50 meters from each other on transects 100 meters apart and perpe...

Journal: :آب و خاک 0
احسان صیاد سید محسن حسینی وحید حسینی محمدحسن صالحه شوشتری

plantations may influence soil fauna directly or indirectly. this research was conducted in order to study the influence of species plantations on soil macrofauna. plantations of eight tree species including nitrogen fixing trees and non-nitrogen fixing trees based on complete randomized block design with 3 replicates were established in 1372 in dez riverside. soil macrofauna were studied rando...

صیاد, احسان, طالشی, حمید, عسکرپور, محمد رضا,

In this study, the abundance and biomass of soil macrofauna were investigated in natural forests of tamarisk and Euphrates poplar in riparian forests of Maroon River in Khuzestan province. Soil macrofauna were collected using 175 sampling plots 50 meter distance from each other on 21 parallel lines with 100 meters distance from each other and perpendicular to the river. Soil macrofauna sampling...

Journal: :Journal of environmental biology 2011
C Salvio A N Lopez P L Manetti N L Clemente

Studies were done to see the effects of five toxic baits based on metaldehyde and/or carbaryl on the taxonomic composition of soil meso and macrofauna, and determined the density of beneficial organisms in soybean under no tillage. Six treatments were tested and soil monoliths were taken before application and at 45 and 75 days after application (DAA). Before application, 1601 individuals were ...

2006
Lisa Cole Mark A. Bradford Peter J.A. Shaw Richard D. Bardgett

This paper reviews the abundance and species richness, and factors that cause these parameters to vary, of mesofauna and macrofauna in an upland grassland soil studied intensively under the NERC Soil Biodiversity Programme. The concept that competitive exclusion does not act within soil communities is reviewed in light of these findings, which are placed in the context of the wider literature r...

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